JP2009276006A - Shutoff valve electric power supply device and shutoff system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety without deteriorating convenience and to avoid waste consumption of a backup power source. <P>SOLUTION: This shutoff valve electric power supply device 10 having a drive electric power supply means 11a1, an electric power interruption detection means 14 and the backup power source 15 is provided with an instantaneous electric power interruption determination means 11a2 for determining whether or not detected electric power interruption is instantaneous; a setting means 16 for setting whether or not a shutoff valve 26 is driven to shut off; and a shutoff electric power supply control means 11a3 which supplies shutoff electric power of the backup power source 15 to a shutoff valve unit 20 when it is determined that the electric power interruption is not instantaneous and does not supply the shutoff electric power of the backup power source 15 to the shutoff valve unit 20 when it is determined that the electric power interruption is instantaneous. When the setting means 16 sets prevention of shutoff of the shutoff valve 26, even if it is determined that the electric power interruption is not instantaneous, the shutoff electric power supply control means 11a3 does not supply the shutoff electric power of the backup power source 15 to the shutoff valve unit 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention has a built-in backup power source for generating a shut-off power for closing the shut-off valve in the event of a power failure of an external power supply, and a shut-off valve power supply device for closing the shut-off valve by the shut-off power in the event of a power failure The present invention relates to a cutoff system having the cutoff valve power supply device.

  The gas shut-off control device shown in Patent Document 1 or the like operates using a commercial power source as a power source, starts an operation of detecting a gas leak state after a certain time from the supply of the commercial power source, and detects a gas leak state A gas alarm that continuously issues a gas leak alarm and generates and outputs a gas leak detection signal, and a shutoff that shuts off the flow of gas that flows through the gas supply path in response to a gas shutoff command signal provided in the gas supply path It is used to configure a gas shut-off system together with a valve. Based on a gas leak detection signal input from a gas alarm, a gas shut-off command signal is output to the shut-off valve to close the valve, and the gas flowing through the gas supply path is It is known to perform control for driving to be cut off.

Such a gas shut-off control device has a built-in backup power source in the event of a power failure (specifically, a DC power source such as a 24V realized by a large-capacity capacitor or battery) and detects a power failure in the commercial power source. In this case, the gas shutoff command signal is output to the shutoff valve by the electric power from the backup power source to close the valve.
JP 2003-279026 A

  In addition, it is known that power outages are roughly classified into two types: instantaneous power outages with short power outage times and other power outages. So far, in the case of an instantaneous power failure, it has been considered that safety can be secured without shutting off the gas. However, considering the improvement of safety, it is desirable to shut off the gas even in the event of an instantaneous power failure. However, since the shut-off valve needs to be driven by the power of the backup power source described above for the shut-off, there is a problem that the backup power source is wasted in an environment where instantaneous power failures occur frequently. In particular, when the shut-off valve is a motor drive system, the drive time required for driving is longer than that of the solenoid system, so that a backup power supply is consumed correspondingly, and a large capacity backup power supply must be built in. The problem of up occurs.

  In addition, if the shutoff valve is closed each time an instantaneous power failure is detected, the gas flow in the gas supply equipment is also shut off. There was a problem that it was lowered.

  Therefore, in view of the above-described problems, an object of the present invention is to provide a shutoff valve power supply device that can improve safety and avoid wasteful consumption of a backup power supply without reducing convenience. .

  In order to solve the above problems, the shutoff valve power supply device according to the first aspect of the present invention has a shutoff valve unit 20 having a driving means 25 for driving the shutoff valve 26, as shown in the basic configuration diagram of FIG. Drive power supply means 11a1 that is electrically connected and supplies power from the external power source 2 to drive the shut-off valve 26 of the shut-off valve unit 20, and a power failure detection means 14 that detects a power failure of the external power source 2. In the shut-off valve power supply device 10 having a backup power source 15 that generates a shut-off power for driving the shut-off valve 26 to shut off in response to the detection of a power outage by the power cut-off detecting means 14, the power cut-off detecting means 14 detects Whether or not the instantaneous power failure determination means 11a2 for determining whether or not the power failure has occurred is an instantaneous instantaneous power failure, and whether or not the shutoff valve 26 of the shutoff valve unit 20 is driven to shut off. When the setting means 16 for setting the power supply and the instantaneous power failure determination means 11a2 determine that there is no instantaneous power failure, the cutoff power of the backup power supply 15 is supplied to the shutoff valve unit 20 and the instantaneous power failure determination means 11a2 And the cutoff power supply control means 11a3 that does not supply the cutoff power of the backup power supply 15 to the cutoff valve unit 20, and the cutoff power supply control means 11a3 shuts off the setting means 16. When it is set not to shut off the valve 26, even if the instantaneous power failure determination means 11a2 determines that it is not an instantaneous power failure, it is a means that does not supply the cutoff power of the backup power source 15 to the cutoff valve unit 20. It is characterized by.

  According to the shutoff valve power supply device of the present invention described in claim 1, when a power failure of the external power source 2 is detected by the power failure detection means 14, the power supply state is continuously monitored and the power failure is detected. Whether or not there is an instantaneous power failure is determined by the instantaneous power failure determination means 11a2. When the shutoff valve 26 is driven to be shut off, the setting means 16 is set, and when the instantaneous power failure determination means 11a2 determines that it is not an instantaneous power failure, the cutoff power supply control means 11a3 determines the cutoff power of the backup power source 15. Is supplied to the shutoff valve unit 20, and is shut off by the shutoff valve 26. When the instantaneous power failure determination unit 11a2 determines that there is an instantaneous power failure, the cutoff power supply control unit 11a3 does not supply the cutoff power of the backup power supply 15 to the cutoff valve unit 20, and the cutoff valve 26 is opened. Will remain. Furthermore, when the setting means 16 is set so as not to shut off the shutoff valve 26, when the instantaneous power failure determination means 11a2 determines that it is not an instantaneous power failure, the cutoff power of the backup power supply 15 is determined by the cutoff power supply control means 11a3. The shutoff valve unit 20 is not supplied and the shutoff valve 26 remains open.

  In order to solve the above problems, the shutoff system according to the second aspect of the present invention is connected to the shutoff valve power supply device 10 according to the first aspect by the power line 3 as shown in the basic configuration diagram of FIG. And a shutoff valve unit 20 that is driven by electric power from the shutoff valve power supply device 10.

  According to the shut-off system of the present invention described in claim 2, the shut-off valve unit 20 is operated by the electric power from the external power source 2 supplied from the shut-off valve power supply device 10. When the shutoff valve power supply device 10 detects a power failure of the external power supply 2, it determines whether the power failure is an instantaneous power failure. If the power failure is not an instantaneous power failure, the power of the backup power supply 15 is used as the shutoff power to the shutoff valve unit 20. Supply. As a result, the shutoff valve unit 20 causes the drive means 27 to drive the shutoff valve 26 by the shutoff power. Further, when the shutoff valve power supply device 10 is set so that the shutoff valve 26 is not shut off by the setting means 16, the shutoff power of the backup power supply 15 is not supplied to the shutoff valve unit 20, and the shutoff valve 26 is opened. Will remain.

  According to a third aspect of the present invention, as shown in the basic configuration diagram of FIG. 1, in the shutoff system according to the second aspect, the shutoff valve unit 20 communicates with the shutoff valve power supply device 10. The unit side communication means 23, the supply stop detection means 24 for detecting the stop of the power supply from the shutoff valve power supply device 10, and the unit side communication means 23 in response to detection of the stop by the supply stop detection means 24. A power failure information transmission means 21a for transmitting power failure information to the shut-off valve power supply device 10 via the device, and the shut-off valve power supply device 10 communicates with the unit side communication means 23 -Side communication means 13, and the abnormal location estimation means 11 a 4 for estimating an abnormal location of the power supply system based on the power failure information received by the device-side communication means 13 and the detection state of the power failure detection means 14. , And having a, and notification means 11a5 for notifying the abnormal location of the abnormal portion estimating means 11a4 guessed.

  According to the shut-off system of the present invention described in claim 3, when the shut-off valve unit 20 detects the stop of power supply from the shut-off valve power supply device 10 by the supply stop detecting means 24, the power failure information transmitting means 21a The power failure information is transmitted to the shutoff valve power supply device 10 via the side communication means 23. And when the shut-off valve power supply device 10 receives the power failure information in a state where no power failure is detected, the power supply line 3, power is detected based on the power failure information and the detection state of the power failure detection means 14 by the abnormal point estimation means 11 a 4. An abnormal location of the power supply system such as the supply unit 11 and the backup power supply 15 is estimated, and the abnormal location is notified by the notification unit 11a5.

  As described above, according to the first and second aspects of the present invention, when the shutoff valve power supply device detects a power failure, whether or not the shutoff power is supplied to the shutoff valve can be set by the setting means. Therefore, since it is possible to drive the shut-off valve of the shut-off valve unit when it is determined whether or not there is an instantaneous power failure, safety can be improved. In addition, when instantaneous power failures occur frequently, the drive of the shut-off valve can be stopped according to the detection of the instantaneous power failures, so that it is possible to prevent wasteful consumption of the backup power supply in the shut-off valve power supply device. Therefore, it is possible to provide a shutoff valve power supply device and a shutoff system that can improve safety and avoid wasteful consumption of a backup power supply without reducing convenience.

  According to the third aspect of the present invention, in addition to the above-described effect, when the shut-off valve unit detects that the power from the shut-off valve power supply device is cut off, the power failure information is sent to the shut-off valve power supply device. Since the shutoff valve power supply device estimates and notifies the power system abnormality location in response to receiving the power failure information, the power system abnormality location can be repaired quickly, so that The shut-off valve can be reliably driven to shut off according to the determination that it is not a power failure, and safety can be further improved.

  Hereinafter, an embodiment in the case of applying a shutoff system having a shutoff valve power supply device according to the present invention to a gas security system will be described below with reference to the drawings of FIGS.

  In FIG. 2, the gas security system 1 corresponds to the shut-off system shown in FIG. 1, and is connected to the operating device 10 provided in the house and the pipe 5 of the gas supply path and controlled by the operating device 10. And a shutoff valve unit 20 for shutting off. The operating device 10 is electrically connected to the external power source 2 and the shut-off valve unit 20, operates with the power supplied from the external power source 2, and supplies the power to the shut-off valve unit 20. .

  In addition, although this embodiment demonstrates the case where the operating device 10 is functioned as the cutoff valve electric power supply apparatus of this invention, this invention is not limited to this, The operating device 10 implement | achieved by the cutoff valve unit 20 is demonstrated. Various embodiments such as incorporation into a system as a dedicated device different from the above can be made. Moreover, although the case where the external power source 2 is a commercial power source will be described, various power sources such as a battery unit according to the embodiment can be used.

  The operating device 10 corresponds to the shutoff valve power supply device in the claims shown in FIG. 1, and includes a microprocessor (MPU) 11 that operates according to a predetermined program. As is well known, the MPU 11 includes a central processing unit (CPU) 11a that performs various processes and controls according to a predetermined program, a ROM 11b that is a read-only memory storing a program for the CPU 11a, and various data. And a RAM 11c, which is a readable / writable memory having an area necessary for processing operations of the CPU 11a.

  At the time of a power failure for causing the CPU 11a to function as the drive power supply means 11a1, the instantaneous power failure determination means 11a2, the cutoff power supply control means 11a3, the abnormal point estimation means 11a4, and the notification means 11a5 in the claims shown in FIG. Various programs such as a power supply processing program are stored. And when CPU11a runs the power supply process program at the time of a power failure, it functions as the instantaneous power failure determination means 11a2, the interruption | blocking electric power supply control means 11a3, the abnormal location estimation means 11a4, and the notification means 11a5 mentioned above.

  The operation device 10 further includes a memory unit 12, a communication unit 13, a power failure detection unit 14, a backup power supply 15, a setting unit 16, a display unit 17, and an operation unit 18, and is electrically connected to the MPU 11. It is connected.

  The memory unit 12 is capable of holding various stored data even when power supply is cut off, and an electrically erasable / rewritable memory (EEPROM) having various storage areas necessary for processing operations of the CPU 11a. Is used. The memory unit 12 stores various information such as determination condition information for determining an instantaneous power failure.

  The communication unit 13 is electrically connected to a cable having the power supply line 3 and the signal line 4 and is also electrically connected to the MPU 11. The communication unit 13 supplies power from the external power source 2 or the backup power source 15 via the MPU 11 to the shutoff valve unit 20 via the power line 3. The communication unit 13 transmits a signal indicating various messages input from the MPU 11 via the signal line 4 to the cutoff valve unit 20 and also indicates a message indicated by a signal received from the cutoff valve unit 20 via the signal line 4. Is output to the MPU 11.

  The power failure detection unit 14 corresponds to the power failure detection means in the claims shown in FIG. 1, and a transistor, a photocoupler, a relay, or the like is arbitrarily used. In this embodiment, a case where a transistor is used will be described. As shown in FIG. 3, in the power failure detection unit 14, the external power source 2 is electrically connected to the base of the transistor 14a via the resistor R1, and the backup power source 15 is electrically connected to the collector via the pull-up resistor R2. The emitter is connected to the circuit ground. Further, the power failure detection port 11e of the MPU 11 is electrically connected between the collector of the power failure detection unit 14 and the pull-up resistor R2.

  When there is power supply from the external power supply 2, the power failure detection unit 14 is dropped to an appropriate voltage with a transformer or the like and applied to the base. Further, the backup power supply 15 is charged. Therefore, in normal times when power is supplied from the external power supply 2, the transistor 14a is turned on and the power failure detection port 11e of the MPU 11 is in the LO state.

  Further, the power failure detection unit 14 has a base voltage of 0V when the power supply from the external power supply 2 is cut off during a power failure, the transistor 14a is turned off, and the power failure detection port 11e is in the LO state by the pull-up resistor R2. Changes from HI to HI. By configuring the power failure detection unit 14 in this manner, the MPU 11 can determine the power failure occurrence status based on the state change of the power failure detection port 11e. Then, after detecting the power failure, the MPU 11 determines whether or not the power failure is an instantaneous power failure of about 0.1 second to about 2 seconds, over a predetermined monitoring time of 5 seconds. 14 states are monitored.

  The backup power source 15 corresponds to the backup power source in the claims shown in FIG. 1, and is a DC power source realized by a large capacity capacitor or battery. The backup power supply 15 has a capacity that takes into account the power required to operate the MPU 11 during a power failure such as 100 seconds. The MPU 11 transmits a shutoff request signal to the shutoff valve unit 20 at the time of a power failure using the backup power.

  The setting unit 16 corresponds to the setting means in the claims shown in FIG. 1, and whether or not the shutoff valve 26 of the shutoff valve unit 20 is driven to shut off when the MPU 11 determines that there is an instantaneous power failure. Set by The setting unit 16 includes a setting dip switch that is hidden by the case main body of the operating device 10 and can be operated only by an operator. In the setting unit 16, the dip switch is set by an operator or the like when the operating device 10 is installed, and the MPU 11 detects the setting state (ON / OFF, etc.) of the dip switch. The setting means may be various different embodiments such as realized by the presence or absence of a jumper.

  The display unit 17 is electrically connected to the MPU 11 and is configured to be able to display in response to a request from the MPU 11. Although not shown, the display unit 17 enters a display state when the LEDs corresponding to power failure detection, failure detection, gas use enabled, gas stoppage, etc. are turned on, and enters a non-display state when the LEDs are turned off.

  The operation unit 18 is electrically connected to the MPU 11 and has a shut-off valve opening / closing switch for requesting closing / opening of a shut-off valve 26 described later. Then, the MPU 11 transmits a cutoff request signal / opening request to the cutoff valve unit 20 in accordance with the operation.

  When the CPU 11a of the operation device 10 having the above-described configuration is activated by power supply from the external power supply 2, a part of the power is cut off via the power supply line 3 of the communication unit 13 by executing a predetermined program. Supply to the valve unit 20. Thereby, the shut-off valve unit 20 is activated and becomes operable. Therefore, in the present embodiment, the case where the CPU 11a functions in step S17 in the claims shown in FIG. 1 as the drive power supply unit 11a1 will be described. However, the present invention is not limited to this, for example, with the MPU 11 Various embodiments such as supplying power using a separate power control circuit or the like can be used.

  Next, an example of the power failure control process executed by the CPU 11a described above will be described below with reference to the flowchart shown in FIG.

  When the power supply processing program at the time of power failure of the ROM 11b is executed by the CPU 11a, it is determined whether or not power failure information has been received from the shutoff valve unit 20 via the communication unit 13 in step S11. When it is determined that the power failure information has not been received (N in S11), the determination process is repeated to wait for the reception of the power failure information. On the other hand, when it is determined that the power failure information is received (Y in S11), the process proceeds to step S12.

  In step S12, with reference to the state of the power failure detection port 11e connected to the power failure detection unit 14, it is determined whether or not the external power source 2 is in a power failure. If it is determined that a power failure is occurring (Y in S12), it is determined in step S13 whether the setting state of the setting unit 16 is ON. If it is determined that the setting state is ON (Y in S13), the process proceeds to step S14.

  In step S14, it is determined whether or not 5 seconds have elapsed since the power failure of the external power source 2 was detected using a timer or the like. The 5 seconds is the above-described monitoring time value that is arbitrarily set to determine an instantaneous power failure. If it is determined that 5 seconds have elapsed (Y in S14), the process proceeds to step S17. On the other hand, when it is determined that 5 seconds have not elapsed (N in S14), the process proceeds to step S15.

  In step S15, with reference to the state of the power failure detection port 11e connected to the power failure detection unit 14, it is determined whether or not the external power source 2 has recovered. If it is determined that power has been restored (Y in S15), the process is terminated. On the other hand, if it is determined that the power has not been restored (N in S15), it is determined in step S16 whether or not a shut-off request signal has been input from the outside via the communication unit 13 or a connection terminal (not shown). If it is determined that the shutoff request signal has not been input (N in S16), the process returns to step S14, and a series of processes is repeated. On the other hand, if it is determined that the cutoff request signal is input (Y in S16), the process proceeds to step S17.

  In step S <b> 17, the power of the backup power supply 15 is supplied to the shutoff valve unit 20 as the shutoff power via the power supply line 3 of the communication unit 13, and a shutoff command is sent to the shutoff valve unit 20 via the signal line of the communication unit 13. In step S <b> 18, it is determined whether or not the cutoff completion information has been received from the cutoff valve unit 20 with reference to the signal line of the communication unit 13. If it is determined that the shutdown completion information has been received (Y in S18), the supply of the cutoff power from the backup power source 15 via the power line 3 is stopped in step S19, and after the power recovery in step S20, the cutoff valve When the display unit 17 is requested to display the valve closed state 26, the display unit 17 displays “gas is stopped”, and then the process is terminated.

  If it is determined in step S18 that the shutoff completion information has not been received (N in S18), a predetermined shutoff completion time of the shutoff valve 26 has elapsed since the start of the shutoff power supply in step S21. It is determined whether or not. If it is determined that it has not elapsed (N in S21), the process returns to step S18, and a series of processes is repeated. On the other hand, if it is determined that the shutdown completion time has elapsed (Y in S21), the cutoff power from the backup power source 15 via the power line 3 of the communication unit 13 is stopped in step S22, and the power recovery is performed in step S23. Thereafter, when the display unit 17 is requested to display a failure of the shutoff valve 26, “failure detection” is displayed on the display unit 17, and then the process ends.

  If it is determined in step S13 that the setting state of the setting unit 16 is not ON, that is, it is OFF (N in S13), in step S23, it is blocked from the outside via the communication unit 13 or a connection terminal (not shown). It is determined whether a request signal has been input. If it is determined that the shutoff request signal has been input (Y in S23), the process proceeds to step S17. On the other hand, if it is determined that the cutoff request signal has not been input (N in S23), the process proceeds to step S24.

  In step S24, it is determined whether or not a predetermined time indicating the monitoring time of the cutoff request signal has elapsed. If it is determined that the predetermined time has elapsed (Y in S24), monitoring of the shutoff request signal is stopped in step S25, and the process is thereafter terminated. On the other hand, if it is determined in step S24 that the predetermined time has not elapsed (N in S24), the external power supply 2 is referred to in step S26 with reference to the state of the power failure detection port 11e connected to the power failure detection unit 14. It is determined whether or not the power has been restored. If it is determined that power has been restored (Y in S26), the process ends. On the other hand, when it is determined that the power has not been restored (N in S26), the process returns to step S23, and a series of processes is repeated.

  If it is determined in step S12 that a power failure is not occurring (N in S12), it is determined in step S27 whether or not a failure in the power supply system corresponding to the drive power supply unit 11a1 has been detected. If it is determined that a power failure has been detected (Y in S27), a display of power failure is requested from the display unit 17 in step S28, so that “failure detection” is displayed on the display unit 17, and thereafter The process ends. On the other hand, if it is determined that a power supply failure has not been detected (N in S27), the display unit 17 is requested to display a power supply line disconnection in step S29. Display, and then the process ends.

  As described above, the CPU 11a executes the power supply process at the time of power failure shown in FIG. 4 so that the CPU 14a can execute the instantaneous power failure determination means 11a2, the cut-off power supply control means 11a3, and the abnormal point estimation means in the claims shown in FIG. 11a4 and notification means 11a5. 4 is the instantaneous power failure determination means 11a2, the series of processing of steps S13 to S22 is the interruption power supply control means 11a3, steps S11 to S12 and step S27 are the abnormal location estimation means 11a4, and steps S28 and S29. This corresponds to the notification means 11a5.

  Next, an example of a schematic configuration of the shutoff valve unit 20 that operates by the electric power supplied from the operation device 10 described above will be described below with reference to the drawing of FIG.

  The shut-off valve unit 20 is driven by electric power supplied from the operation device 10 described above via the power line 3 and the like, and operates according to a predetermined program, a microprocessor (MPU) 21, a memory unit 22, and a communication unit. 23, a power failure detection circuit 24, a backup power source 25, a shut-off valve 26, and a drive unit 27, which are electrically connected.

  As described above, the MPU 21 includes the CPU 21a, the ROM 21b, and the RAM 21c. The ROM 21b stores a power failure drive processing program and the like for causing the CPU 21a to function as a power failure information transmission unit in the claims shown in FIG. And when CPU21a runs a drive processing program at the time of a power failure, it will function as a power failure information transmission means mentioned above. The memory unit 22 uses an EEPROM or the like and stores various types of information received from the operation device 10.

  The communication unit 23 is electrically connected to the power line 3 and the signal line 4 described above, and is also electrically connected to the MPU 21. The communication unit 23 is configured to operate the MPU 21 by being supplied with power from the external power source 2 or the backup power source 15 from the controller device 10 via the power line 3 and outputting the power to the MPU 21. The communication unit 23 transmits signals indicating various messages input from the MPU 21 via the signal line 4 to the controller device 10, and also transmits messages indicated by signals received from the controller device 10 via the signal line 4 to the MPU 21. Output to.

  The power failure detection unit 24 corresponds to the supply stop unit 24 in the claims shown in FIG. 1, and a transistor, a photocoupler, a relay, or the like is arbitrarily used. In this embodiment, a case where a transistor is used will be described. Since the power failure detection unit 24 has the same configuration as the power failure detection unit 14 of the controller 10 described above, detailed description thereof is omitted, but the base of the transistor is electrically connected to the power supply line 3 of the communication unit 23. The connection form with the MPU 21 is the same. The power failure detection unit 24 detects a stop of power supply from the operation device 10 as a power failure.

  The backup power source 25 is a DC power source realized by a large capacity capacitor or battery. The backup power source 25 has a sufficient capacity in consideration of the power required to operate the MPU 21 for a predetermined time during a power failure, such as driving the motor-driven shut-off valve 26 to shut off. In addition, it is normally charged with the electric power supplied from the operating device 10.

  The shutoff valve 26 is electrically connected to the MPU 21 via the drive unit 27, and a motor drive shutoff valve, a solenoid shutoff valve, or the like is arbitrarily used. In the present embodiment, a case where a motor-driven cutoff valve is used as the cutoff valve 24 will be described. The shutoff valve 24 shuts off the gas supply in the pipe 5 when the valve is closed by the MPU 21, and enables the gas supply in the pipe 5 when the valve is opened. The drive unit 27 corresponds to the drive means 27 in the claims shown in FIG. 1, and outputs a valve closing drive signal to the shutoff valve 26 in response to a valve closing request from the MPU 21 or shuts off in response to a valve opening request. By outputting a valve opening drive signal to the valve 26, the shutoff valve 26 is rotated.

  Next, an example of the power failure driving process executed by the CPU 21a will be described below with reference to the flowchart shown in FIG.

  When the CPU 21a executes the power failure drive processing program in the ROM 21b, in step T51, it is determined whether or not a power failure has occurred by referring to the state of each port connected to the power failure detection unit 24. When it is determined that a power failure has not occurred (N in T51), the occurrence of a power failure is monitored by repeating this determination process. On the other hand, when it is determined that a power failure has occurred, that is, when power is not supplied from the controller device 10 (Y in T51), the process proceeds to step T52.

  In step T52, the communication unit 23 is requested to transmit power outage information indicating the occurrence of a power outage, so that the power outage information is transmitted to the controller device 10 through the signal line of the communication unit 23. In step T53, the communication unit It is determined whether or not a shut-off command has been received from the controller device 10 via the signal line. If it is determined that the signal has not been received (N in T53), the determination command is repeated to continue monitoring the cutoff command. On the other hand, if it is determined that a blocking instruction has been received (Y in T53), the process proceeds to step T54.

  In step T54, the cutoff power supplied via the power line 3 of the communication unit 23 is supplied to the drive unit 27 and the valve closing is requested, so that the cutoff valve 26 is moved to the valve closed position by the drive unit 27. In step T55, it is determined whether or not the shutoff of the shutoff valve 26 is completed based on the rotation position of the shutoff valve 26, the driving time, and the like. When it is determined that the blocking has been completed (N in T55), in step T56, the communication unit 23 is requested to transmit the blocking completion information indicating the completion of the blocking. The data is transmitted to the controller device 10 via the line, and then the process is terminated.

  If it is determined in step T55 that the shutoff has not been completed (N in T55), whether or not the completion time has elapsed since the start of the shutoff valve 26 is started by a timer, a clock IC or the like in step T57. Is determined. When it is determined that the completion time has not elapsed (N in T57), the process returns to Step T55, and a series of processes is repeated. On the other hand, when it is determined that the completion time has elapsed (Y in T57), the drive unit 27 is requested to stop in step T58, and the drive power supplied via the power line 3 of the communication unit 23 is driven. When the supply to the unit 27 is stopped, the drive of the drive unit 27 is stopped, and then the processing ends. By forcibly stopping the supply of power in this way, wasteful consumption of the backup power supply 15 of the operating device 15 is prevented.

  As described above, the CPU 11a performs the power supply process at the time of power failure shown in FIG. 5, so that the CPU 14a functions as a power failure information transmission unit in the claims shown in FIG. And step T52 in FIG. 5 is equivalent to a power failure information transmission means.

  Next, an example of the operation (action) of the operating device 10 and the shutoff valve unit 20 corresponding to the shutoff valve power supply in the gas safety system 1 having the above-described configuration will be described.

  The operating device 10 activated by power supply from the external power supply 2 supplies the power to the shutoff valve unit 20 and monitors the occurrence of instantaneous power failure and power failure of the external power source 2 based on the state change of the power failure detection unit 14. To do. When the setting unit 16 is set to the ON state, the controller device 10 does not shut off the shutoff valve unit 20 when a predetermined instantaneous power failure (for example, within 5 seconds) of the external power source 2 is detected. When a power failure that is longer than an instantaneous power failure is detected, as one of the recovery operations for ensuring safety in the event of a power failure, the power of the backup power supply 15 is supplied as a cutoff power as the cutoff valve unit 20, and the cutoff valve unit A shut-off command signal is transmitted to 20. As a result, the shutoff valve unit 20 closes the shutoff valve 26 to shut off the gas supply path, thereby preventing the occurrence of a gas leak accident due to a power failure. Further, when the setting unit 16 is set to the OFF state, the controller device 10 detects the predetermined instantaneous power failure of the external power source 2 and even if it is determined that the power failure is not an instantaneous power failure, the backup power source 15 Is not supplied as the shutoff power as the shutoff valve unit 20.

  Therefore, since the setting unit 16 can set whether or not the shut-off power is supplied to the shut-off valve unit 20 when the operating device (shut-off valve power supply device) 10 detects a power failure, it is an instantaneous power failure. Since it is possible to drive the shutoff valve 26 of the shutoff valve unit 20 when it is determined whether or not, safety can be improved. In addition, when instantaneous power failures occur frequently, the drive of the shutoff valve according to the detection of the instantaneous power failures can be stopped, so that it is possible to prevent wasteful consumption of the power of the backup power supply 15 in the controller device 10. Therefore, it is possible to provide the gas security system 1 having the operation device 10 that can improve safety and avoid wasteful consumption of the backup power supply without reducing convenience.

  In addition, when the operation device 10 supplies power from the external power source 2 to the shutoff valve unit 20, the shutoff valve unit 20 detects a power failure, that is, when power supply from the operation device 10 is stopped, the power failure information is displayed. The data is transmitted to the controller device 10 via the communication line 4. Then, the controller device 10 estimates the failure location of the power supply system with reference to the received power failure information and predetermined confirmation points such as the drive power supply means 11a1, and displays the abnormal location on the display unit 17. Notify at.

  Therefore, when the shut-off valve unit 20 detects that the power from the operation device 10 has been cut off, the power failure information is transmitted to the operation device 10, and the operation device 10 receives an abnormality in the power supply system in response to the reception of the power failure information. Since the location was estimated and notified, the abnormal location of the power supply system can be repaired quickly, so that the shutoff valve can be driven to shut off reliably according to the determination that it is not an instantaneous power failure, Safety can be further improved.

  As described above, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows the basic composition of the cutoff valve electric power supply apparatus and cutoff system which concern on this invention. 1 is a system configuration diagram showing a schematic configuration of a gas security system to which the present invention is applied. It is a block diagram which shows an example of schematic structure of the power failure detection part in FIG. It is a flowchart which shows an example of the power supply process at the time of a power failure which concerns on this invention which CPU of the operating device in FIG. 2 performs. It is a flowchart which shows an example of the drive process at the time of the power failure which concerns on this invention which CPU of the cutoff valve unit in FIG. 2 performs.

Explanation of symbols

1 Shut-off system (gas security system)
2 External power supply 3 Power supply line 4 Signal line 5 Piping 10 Shut-off valve power supply device (operating device)
11a1 Drive power supply means (CPU of operation device)
11a2 Instantaneous power failure determination means (CPU of operating device)
11a3 Breaking power supply control means (CPU of operating device)
11a4 Abnormal point estimation means (CPU of operation device)
11a5 notification means (CPU of the operation device)
13 Device side communication means 14 Power failure detection means 15 Backup power supply 16 Setting means 20 Shutoff valve unit 21a Power failure information transmission means (CPU of shutoff valve unit)
23 Unit side communication means 26 Shut-off valve 27 Driving means

Claims (3)

A drive power supply means electrically connected to a shutoff valve unit having a drive means for driving the shutoff valve and supplying power from an external power source to drive the shutoff valve of the shutoff valve unit; and a power failure of the external power supply In a shutoff valve power supply device comprising a power failure detection means for detecting the power supply, and a backup power supply that generates a shutoff power for driving the shutoff valve in response to a power failure detected by the power failure detection means,
Instantaneous power failure determination means for determining whether or not the power failure detected by the power failure detection means is an instantaneous power failure;
Setting means for setting whether to shut off the shutoff valve of the shutoff valve unit;
When the instantaneous power failure determination means determines that it is not an instantaneous power failure, the interruption power of the backup power supply is supplied to the shutoff valve unit, and when the instantaneous power failure determination means determines that it is an instantaneous power failure, the backup power supply is interrupted. A cutoff power supply control means for supplying no power to the cutoff valve unit;
Have
When the shut-off power supply control means is set so that the setting means does not shut off the shut-off valve, the shut-off power of the backup power supply is shut off even if the instantaneous power failure determination means determines that it is not an instantaneous power failure. A shutoff valve power supply device, characterized in that it is means not supplied to the valve unit.   A shut-off system comprising: the shut-off valve power supply device according to claim 1; and a shut-off valve unit driven by electric power from the shut-off valve power supply device connected by a power line. The shut-off valve unit communicates with the shut-off valve power supply device, a unit-side communication means, a supply stop detection means for detecting a stop of power supply from the shut-off valve power supply device, and the supply stop detection A power failure information transmitting means for transmitting power failure information to the shutoff valve power supply device via the unit side communication means in response to detection of a stop by the means,
Based on the apparatus-side communication means that communicates with the unit-side communication means, and the power failure information received by the apparatus-side communication means and the detection state of the power failure detection means. 3. The shut-off system according to claim 2, further comprising: an abnormal part estimating unit that estimates an abnormal part of the power supply system; and a notification unit that notifies the abnormal part estimated by the abnormal part estimating unit.

Images